.left-view{
  position: fixed;
  top: 0;
  left: 15px;
}
.left-view div{
  display: block;
  width: 100px;
  height: 40px;
  line-height: 40px;
  border: 1px solid #aaa;
  box-sizing: border-box;
  margin: 20px 0;
}